Participants

The target population for the usability study was HCWs employed by the Aurum Institute and CHAPS working at VMMC static and mobile clinics within 2 districts: Ekurhuleni and Bojanala. Ekurhuleni was chosen because it is largely urban, and Bojanala was chosen because it is predominantly rural. The criteria for HCW inclusion in this study were as follows: (1) being a HCW aged ≥18 years and (2) employed in the 2wT study in Ekurhuleni, Gauteng, or Bojanala, North West province, South Africa. The participants for the research study were selected using a purposive sampling technique based on their willingness to participate in the study and the criteria for inclusion in the research study. A total of 7 HCWs participated in the research study.